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Working with models, data and dynamic libraries in Mosel

Description
ExSet.vb: Using sets in Mosel (requires burglari.mos)
  • retrieve a set by its model name
  • get the set size
  • get first and last set element
  • get the name or index of a set element
ExAs.vb: Using arrays with index sets (requires trans.mos)
  • get indexing sets of an array
  • get array type
  • enumerate array entries in usual and transposed order
  • enumerate true array entries
ExProb.vb: Accessing problems and solution information with Mosel (requires blend2.mos)
  • export problem to a file (MPS or LP format)
  • get problem status
  • get objective function value
  • get primal/dual solution values, and constraint activity
ExLib.vb: Working with models and accessing dynamic libraries in Mosel
  • load and unload BIM models
  • run a model in Mosel
  • display information about loaded models
  • display information about additional libraries required by the loaded models
DispMod.vb: Display the contents of a model; the information is read from a bim file
  • display run-time parameters, requirements, symbols, package/module dependencies, annotations
DispDso.vb: Display the contents of a module
  • display constants, types, control paramters, subroutines, I/O drivers
ExDrvs*.cb.: Use I/O drivers to handle Mosel output with a callback function, compile a model from memory to memory, load a bim file from memory, initialise arrays in the Model program from .NET objects and retrieve information from the model through memory.
  • ExDrvsCallback.vb: using 'dotnet:' I/O driver for data exchange via callbacks
  • ExDrvsRaw.vb: using 'dotnetraw:' I/O driver for data exchange in memory
  • ExDrvsStream.vb: using 'dotnetstream:' I/O driver working with streams for data exchange in memory
These .vb files can be run from the VB.NET project Mosel-VB.NET.vbproj (required auxiliary files: frmMain.vb, frmMain.resx, OptimizerLog.vb).

mmexdatavb.zip[download all files]

Source Files

Data Files





trans.mos

(!*******************************************************
  * Mosel Example Problems                              *
  * ======================                              *
  *                                                     *
  * file trans.mos                                      *
  * ``````````````                                      *
  * Example for the use of the Mosel language           *
  * (Network problem: transport from depots to          *
  *  customers)                                         *
  *                                                     *
  * (c) 2008 Fair Isaac Corporation                     *
  *     author: S. Heipcke, 2001                        *
  *******************************************************!)    

model Transport                     ! Start a new model

uses "mmxprs"                       ! Load the optimizer
                                  
public declarations
 Suppliers: set of string           ! Set of suppliers
 Customers: set of string           ! Set of customers
 COST: dynamic array(Suppliers,Customers) of real  ! Unit cost of sending from depot d
                                        ! to customer c
 AVAIL: array(Suppliers) of real    ! Availability of products
 DEMAND: array(Customers) of real   ! Demand by customers

 x: dynamic array(Suppliers,Customers) of mpvar ! Flow from supplier s to customer c
end-declarations

                                    ! Read data from file
initializations from "Models/trans.dat"
 COST AVAIL DEMAND
end-initializations

 forall(s in Suppliers, c in Customers| COST(s,c)>0)
  create(x(s,c))
 
                                    ! Objective: minimize total cost
 Min:= sum(s in Suppliers, c in Customers) COST(s,c)*x(s,c) 

 forall(s in Suppliers) L(s):= sum(c in Customers) x(s,c) <= AVAIL(s)
 forall(c in Customers) D(c):= sum(s in Suppliers) x(s,c) >= DEMAND(c) 

 minimize(Min)
  
end-model

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